Rubidium-85 (⁸⁵Rb)
Cov Khoom Siv Lub Cev Atomic
⁸⁵Rb muaj lub xeev av hluav taws xob teeb tsa ntawm [Kr]5s¹ thiab muaj cov qauv atomic hyperfine tseem ceeb:
- Kab D₁ (794.6 nm)**: 5²S₁/₂→5²P₁/₂ hloov pauv
- Kab D₂ (780.0 nm)**: 5²S₁/₂→5²P₃/₂ hloov pauv
Nws qhov zaus faib ua hyperfine (3.035 GHz) yog li 50% qis dua li ntawm ⁸⁷Rb. Qhov sib txawv no yog siv dav hauv **isotope selective laser cooling** thev naus laus zis.
Kev siv tshuab quantum
1. Kev kawm txog lub cev txias:
Ua ib lub isotope fermion (nuclear spin half-integer), lub Bose-Fermi hybrid system uas muaj ⁸⁵Rb thiab ⁸⁷Rb yog ib lub platform tseem ceeb rau kev kawm txog kev sib cuam tshuam ntawm cov pa roj quantum degenerate.
Nws yog siv los simulate tus qauv Hubbard hauv kev sim optical tweezers.
2. Cov ntaub ntawv txog quantum:
Lub xeev tsis muaj zog ntawm ⁸⁵Rb (m_F = 0) siv tau ua lub xeev khaws cia khoom sib xws, thiab lub sijhawm decoherence tuaj yeem ncav cuag ob peb vib nas this.
3. Kev ntsuas qhov tseeb:
Siv qhov ⁸⁵Rb/⁸⁷Rb isotope shift (1.2 GHz) los calibrate tus qauv zaus laser.
Kev siv rau kev tshawb fawb txog kev lag luam thiab kev tshawb fawb
- Lim dej Atomic: ⁸⁵Rb vapor chamber siv los ua cov lim dej optical nqaim-band (
- Kev ntsuas isotope: Kev nplua nuj ntawm cov tshuaj sib xyaw ua ke ⁸⁵Rb los kawm txog kev ua haujlwm ntawm cov potassium ion channels hauv cov kab mob.
- Lub zog sib nqus ntawm lub zog nuclear: ⁸⁵Rb NMR (zaus 16.5 MHz ntawm 2.35 T) yog siv los kawm txog cov qauv hauv zos ntawm cov tshuaj rubidium.
Kev siv tshuab sib cais isotope
Cov txheej txheem tseem ceeb rau kev tau txais cov khoom muaj purity siab ⁸⁵Rb los ntawm cov roj rubidium ntuj yog:
1. Txoj kev sib cais electromagnetic: kev sib cais spectrometry pawg (purity> 99.9%)
2. Txoj kev sib cais laser: siv txoj kab nqus tshwj xeeb ntawm ⁸⁵Rb (xws li 780.241 nm)
3. Txoj kev sib pauv tshuaj lom neeg: raws li cov nyhuv ntawm isotope fractionation ntawm Rb crown ether complex
Kev Nyab Xeeb thiab kev ua haujlwm
Ua ib qho isotope ruaj khov, ⁸⁵Rb tsis muaj kev phom sij ntawm cov tshuaj radioactive, tab sis cov hlau yuav tsum tau ua raws li cov cai kev nyab xeeb ntawm cov hlau alkali (tsis muaj dej noo thiab tsis muaj hluav taws). Nws cov tshuaj lom tsawg dua (LD₅₀> 5 g / kg).
Xaus lus
⁸⁵Rb muaj txiaj ntsig tshwj xeeb hauv kev simulation quantum, kev ntsuas qhov tseeb thiab kev siv tshuab spectroscopy vim nws cov khoom siv nuclear ruaj khov thiab cov qauv qib zog nplua nuj. Raws li "tus khub ruaj khov" ntawm ⁸⁷Rb, ob qho ua ke yog lub hauv paus tseem ceeb ntawm cov txheej txheem siv rubidium isotope, thiab txuas ntxiv txhawb kev txhim kho ntawm cov khoom siv atom txias thiab kev siv tshuab quantum.